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Beginner

QSFP Link Problem

Hi All

We have two N7700 and two N5600 switches.

I tried to connect switches as below diagram with   40GBASE-CR4 QSFP Twinax Cables (QSFP-H40G-CU2M).

N7K-1 ------ N7K-2

|                            |

|                            |

N5K-1 ------ N5K-2

Now, the link between two N7Ks and the link between two N5Ks are up. But The link between N7ks and N5Ks are down.

I have replaced the cables between switches several times.

Need your valuable inputs on this to fix this issue.

 

1 ACCEPTED SOLUTION

Accepted Solutions
Beginner

Re: QSFP Link Problem

Hi Scott,

Sure, I do believe that.

"Not supported" does not mean it does not work, and if by chance it works today, it means you have to expect it willl not work tomorrow, or after the next firmware upgrade (or between 2 different platform, like you have here).

Honestly, I don't think it competes with the 200$ to replace with CU3M...

 

Remi Astruc

 

 

4 REPLIES 4
Beginner

Re: QSFP Link Problem

Hi Scott,

Unfortunately the answer is quite simple. 

QSFP-H40G-CU2M is not supported on the mentioned platforms, but only on C9400 as of today.

Go for the 1M or 3M version.

 

Remi Astruc

Beginner

Re: QSFP Link Problem

Dear Remi Astruc,

Thanks for your kind attention. as I mentioned this cable is work between two n5k or n7k.

Best Regard 

Beginner

Re: QSFP Link Problem


@Remi Astruc wrote:

Hi Scott,

Unfortunately the answer is quite simple. 

QSFP-H40G-CU2M is not supported on the mentioned platforms, but only on C9400 as of today.

Go for the 1M or 3M version.

 

Remi Astruc



Dear Remi Astruc,

Thanks for your kind attention. as I mentioned this cable is work between two n5k or n7k.

Best Regard 

Beginner

Re: QSFP Link Problem

Hi Scott,

Sure, I do believe that.

"Not supported" does not mean it does not work, and if by chance it works today, it means you have to expect it willl not work tomorrow, or after the next firmware upgrade (or between 2 different platform, like you have here).

Honestly, I don't think it competes with the 200$ to replace with CU3M...

 

Remi Astruc

 

 

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